US4254561A - Drying cylinder for a paper-making machine - Google Patents

Drying cylinder for a paper-making machine Download PDF

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Publication number
US4254561A
US4254561A US06/098,341 US9834179A US4254561A US 4254561 A US4254561 A US 4254561A US 9834179 A US9834179 A US 9834179A US 4254561 A US4254561 A US 4254561A
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US
United States
Prior art keywords
hollow shaft
drying cylinder
cylinder according
steam
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/098,341
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English (en)
Inventor
Christian Schiel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Application granted granted Critical
Publication of US4254561A publication Critical patent/US4254561A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/022—Heating the cylinders
    • D21F5/028—Heating the cylinders using steam
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/021—Construction of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00—Heat-exchange apparatus employing moving conduits
    • F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller

Definitions

  • the invention relates to a drying cylinder for a paper-making machine. Such a machine is shown in U.S. Pat. No. 3,724,094.
  • a known drying cylinder comprises a cylinder jacket, two end covers closing the jacket, a respective bearing journal at each end cover at which the cylinder is rotated, and a hollow shaft inside the cylinder which links the covers and the journals. Drying cylinders of this type are particularly useful in large diameters, e.g. as creping cylinders and machine glazing cylinders.
  • the hollow shaft increases the strength of the cylinder and prevents the cover from moving apart as a result of the internal steam pressure.
  • the transfer of heat from the steam chamber to the walls of the cylinder improves and becomes more uniform as the suction nozzles (siphons) are more uniformly distributed over the inner surface of the cylinder jacket.
  • This transfer of heat is best if a very large number of small suction nozzles, each having an internal diameter of approximately 4 to 5 mm, for example, are distributed as uniformly as possible over the inner surface of the cylinder.
  • these small suction nozzles are sensitive to obstruction. Solid materials, which have been introduced via the steam line, can build up slowly in the nozzles and produce obstructions. When individual nozzles are obstructed, the uniformity of the heat transfer is adversely affected.
  • the steam enters the cylinder it may already be partially condensed, in whch case the condensate entering the cylinder can cause the heat transfer to be impaired and rendered non-uniform.
  • a drying cylinder for paper-making machines comprises a cylinder barrel and two end covers mounted on a hollow shaft.
  • the shaft has an inlet for steam and has outlet openings for passage of the steam to the inner walls of the cylinder barrel.
  • the outlet openings in the hollow shaft are provided with tubular components which project into the interior of the hollow shaft.
  • the fresh steam entering the shaft usually through a journal, thus is not simply conveyed through openings or nozzles in the hollow shaft to the outer annular chamber, together with the impurities carried in the steam. Instead, the steam is conveyed through the tubular components, which prevent materials which have accumulated on the inner walls of the hollow shaft, as a result of gravity or centrifugal force, from being discharged into the cylinder annular chamber.
  • the interior of the hollow shaft serves as a collecting container for undesired materials.
  • the impurities in the steam include solid particles, these can be removed from time to time through manholes in the covers and the hollow shaft. If, on the other hand, the impurities also include condensate which has accumulated in the hollow shaft, then in accordance with another feature of the invention, this condensate, as well as smaller solid particles, can be continuously drawn off by means of suction devices arranged close to the inner surface of the hollow shaft.
  • suction devices can conveniently be linked to condensate discharge pipelines which are provided for removal from the cylinder of the condensate which has formed on the walls of the cylinder.
  • the removal results from a difference in pressure, i.e. the pressure in the condensate discharge pipeline is lower than that in the cylinder. Consequently, the suction devices in the hollow shaft need merely be connected to this condensate discharge pipeline, which must be conducted through the hollow shaft anyhow. Thus, no further measures or devices are required for this purpose.
  • the inner surface of the hollow shaft can be provided with synclinal or trough-shaped recesses in which the condensate can accumulate and into which the suction devices project.
  • the tubular components are cut off obliquely, preferably at their free ends which project into the interior of the hollow shaft, and are oriented so that the longer part of the tubular component will face toward the steam inlet side.
  • a baffle plate between the steam inlet and the first tubular component provides the required obstruction.
  • the hollow shaft is a cast component
  • the drying cylinder shown in the drawing comprises a cylinder barrel or jacket 1, which is connected by end covers 2 and 3 to a relatively wider hollow shaft 4 located inside the cylinder 1.
  • the cylinder is provided with relatively narrower hollow bearing journals 5 and 6.
  • a steam inlet 10 is formed within the journal 6.
  • Condensate is discharged via one or more siphon collectors 7. Only one siphon collector 7 has been shown. It is possible to incorporate any desired number of collectors. Each collector comprises a plurality of individual siphons 8 distributed uniformly over the axial length of the cylinder. The siphon collectors are drained through condensate discharge pipelines 9, which draw the condensate out of the cylinder through the hollow shaft 4 and the journal 5.
  • the steam which enters at inlet 10 through the journal 6 passes out of the hollow shaft 4 through tubular components 11 into the annular chamber 12 of the cylinder, which is defined outside the hollow shaft 4.
  • the tubular components are arrayed annularly around the shaft and at regular intervals along the axial length of the shaft.
  • the free ends of the tubular components 11 which project inward into the hollow shaft 4 are bevelled and are oriented so that the longer part of the tubular component faces toward the steam inlet 10. This orientation blocks dirt particles from being thrown or blown into the tubular components.
  • Pollutants and condensate are deposited on the inner walls 13 of the hollow shaft 4. They can be continuously drawn off by means of one or more auxiliary siphons 14 which open into the condensate discharge pipeline 9.
  • a respective trough or depression 15 is formed into which the suction opening of each siphon 14 projects.
  • baffle plate 16 may be placed between the steam inlet 10 and the nearest tubular component 11, as shown in dashed lines in the drawing, in order to prevent particles of dirt from being thrown directly into the tubular components 11.
  • the above described drying cylinder uses means which are relatively simple and cheap to reduce the amount of contaminating material or condensate that can be introduced into the region of the cylinder walls together with the steam, so that good, uniform transfer of heat can be obtained, which is relatively unaffected by the condition and pollution of the inflowing steam.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Paper (AREA)
US06/098,341 1978-12-06 1979-11-29 Drying cylinder for a paper-making machine Expired - Lifetime US4254561A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2852731A DE2852731C2 (de) 1978-12-06 1978-12-06 Trockenzylinder für Papiermaschinen
DE2852731 1978-12-06

Publications (1)

Publication Number Publication Date
US4254561A true US4254561A (en) 1981-03-10

Family

ID=6056457

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/098,341 Expired - Lifetime US4254561A (en) 1978-12-06 1979-11-29 Drying cylinder for a paper-making machine

Country Status (6)

Country Link
US (1) US4254561A (de)
JP (1) JPS585319B2 (de)
AT (1) AT371513B (de)
DE (1) DE2852731C2 (de)
GB (1) GB2036927B (de)
SE (1) SE443168B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4710271A (en) * 1986-04-08 1987-12-01 Ray R. Miller Belt and drum-type press
US4758310A (en) * 1986-04-08 1988-07-19 Miller Ray R Belt and drum-type pressing apparatus
US4781795A (en) * 1986-04-08 1988-11-01 Ray R. Miller Heated drum having high thermal flux and belt press using same
US5165471A (en) * 1991-10-01 1992-11-24 American Screw Press, Inc. Heat exchanger fluid removal system
US20070294914A1 (en) * 2005-01-05 2007-12-27 Rainer Kloibhofer Drying cylinder
US20080005921A1 (en) * 2005-01-05 2008-01-10 Thomas Gruber-Nadlinger Device and method for producing and/or finishing a web of fibrous material
CN101929096A (zh) * 2010-08-30 2010-12-29 陕西科技大学 一种造纸烘缸内汽刀组合件
CN103334332A (zh) * 2013-06-05 2013-10-02 杭州大路实业有限公司 高速卫生造纸机系统的高效干燥烘缸装置及其干燥方法
CN103673579A (zh) * 2012-09-06 2014-03-26 东港市合金烘缸厂 一种双层高效节能烘缸
CN104792149A (zh) * 2015-04-27 2015-07-22 江苏华东造纸机械有限公司 工业钢制焊接加热烘筒
CN113322711A (zh) * 2021-06-09 2021-08-31 浙江金龙再生资源科技股份有限公司 一种纸机高效蒸汽管道系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383837B (de) * 1982-05-26 1987-08-25 Voith Gmbh J M Trockenzylinder fuer papiermaschinen
CN107639887A (zh) * 2016-07-22 2018-01-30 上海大松瓦楞辊有限公司 一种储水槽式瓦楞辊

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563692A (en) * 1944-09-21 1951-08-07 Scott Paper Co Yankee drier
US3177932A (en) * 1963-06-24 1965-04-13 Hupp Corp Drum type heat transfer apparatus
US3299531A (en) * 1964-08-21 1967-01-24 Kimberly Clark Co Papermaking machine
US3363328A (en) * 1965-11-26 1968-01-16 Kimberly Clark Co Rotary drying drum
US3633662A (en) * 1970-01-16 1972-01-11 Beloit Corp Dryer drum assembly
US3967386A (en) * 1973-09-11 1976-07-06 Asfura A C M Multiple rotary syphon for condensate removal from a steam-heated rotary cylinder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5046906A (de) * 1973-08-31 1975-04-26

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563692A (en) * 1944-09-21 1951-08-07 Scott Paper Co Yankee drier
US3177932A (en) * 1963-06-24 1965-04-13 Hupp Corp Drum type heat transfer apparatus
US3299531A (en) * 1964-08-21 1967-01-24 Kimberly Clark Co Papermaking machine
US3363328A (en) * 1965-11-26 1968-01-16 Kimberly Clark Co Rotary drying drum
US3633662A (en) * 1970-01-16 1972-01-11 Beloit Corp Dryer drum assembly
US3967386A (en) * 1973-09-11 1976-07-06 Asfura A C M Multiple rotary syphon for condensate removal from a steam-heated rotary cylinder

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4710271A (en) * 1986-04-08 1987-12-01 Ray R. Miller Belt and drum-type press
US4758310A (en) * 1986-04-08 1988-07-19 Miller Ray R Belt and drum-type pressing apparatus
US4781795A (en) * 1986-04-08 1988-11-01 Ray R. Miller Heated drum having high thermal flux and belt press using same
US5165471A (en) * 1991-10-01 1992-11-24 American Screw Press, Inc. Heat exchanger fluid removal system
US7802377B2 (en) * 2005-01-05 2010-09-28 Voith Patent Gmbh Drying cylinder
US20080005921A1 (en) * 2005-01-05 2008-01-10 Thomas Gruber-Nadlinger Device and method for producing and/or finishing a web of fibrous material
US20070294914A1 (en) * 2005-01-05 2007-12-27 Rainer Kloibhofer Drying cylinder
CN101929096A (zh) * 2010-08-30 2010-12-29 陕西科技大学 一种造纸烘缸内汽刀组合件
CN103673579A (zh) * 2012-09-06 2014-03-26 东港市合金烘缸厂 一种双层高效节能烘缸
CN103334332A (zh) * 2013-06-05 2013-10-02 杭州大路实业有限公司 高速卫生造纸机系统的高效干燥烘缸装置及其干燥方法
CN103334332B (zh) * 2013-06-05 2015-06-10 杭州大路装备有限公司 高速卫生造纸机系统的高效干燥烘缸装置及其干燥方法
CN104792149A (zh) * 2015-04-27 2015-07-22 江苏华东造纸机械有限公司 工业钢制焊接加热烘筒
CN113322711A (zh) * 2021-06-09 2021-08-31 浙江金龙再生资源科技股份有限公司 一种纸机高效蒸汽管道系统

Also Published As

Publication number Publication date
JPS585319B2 (ja) 1983-01-29
GB2036927B (en) 1983-01-06
AT371513B (de) 1983-07-11
SE7909950L (sv) 1980-06-07
GB2036927A (en) 1980-07-02
DE2852731B1 (de) 1980-05-29
SE443168B (sv) 1986-02-17
JPS5580592A (en) 1980-06-17
DE2852731C2 (de) 1981-02-05
ATA657179A (de) 1982-11-15

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